Under REACH, the new chemicals policy in Europe, exposure scenarios form an essential basis for chemical risk assessment reports to show that chemicals can be used safely. This requires a tiered exposure assessment approach in which the first Tier is […]
Objectives Overview Identify the key properties and parameters impacting bioconcentration factor (BCF) measurements in the laboratory and those impacting field bioaccumulation factor (BAF) assessments. Select a test set of chemicals which include high production volume (HPV) substances in the […]
The objectives of this project ar the following: Literature search on biological variability and evaluation with regard to organ weights, cylcicity, sperm parameters Drafting of pre- and main study for the assessment of biological variability
It is foreseen that the assessment of hazard and risk of chemicals under the REACH legislation is assisted by the application of computational methods. In vivo toxicity intrinsically reflects metabolism. Consequently, risk assessment can not neglect metabolism of chemicals. Hence, […]
Masculinisation depends on adequate production of testosterone by the fetal testis within a specific'male programming window'. Disorders resulting from subtle deficiencies in this process are common in humans and environmental exposures/lifestyle could contribute causally as common therapeutic and environmental compounds […]
The analysis of epigenetic modifications at the level of the genome is a very promising field of research. The major question to be addressed is how the epigenome distinguishes cell types and how epigenetic variability between individuals reflects the influence […]
Recently evidence evolved that environmental compounds can interfere with the endocrine systems of wildlife and humans. Surface waters are suggested to be the main sink for these so called endocrine disruptors (ED). Therefore aquatic species seem to be the main […]
The specific objectives of the project are: - Development of a ”Threshold of Toxicological Concern (TTC)” concept for ecotoxicology that is analogous to the mammalian approach. Potency, environmental fate and exposure to a substance should be considered to establish environmental […]
The overall objective of this research project is: - To describe the nature of accidental misuse of chemicals and chemical products available to consumers and to put this information in the context of overall estimates of accidental injury from chemicals. […]
In a 21-day-assay (phase 1 B), sexually mature female and male fathead minnows (Pimephales promelas) were exposed to a weak estrogen agonist, or a weak aromatase inhibitor, under flow-through conditions. Three different test-compound concentrations, a water-only control, and a corresponding positive control […]
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